HDB: Add OmniBot functions

3 files changed, 133 insertions, 16 deletions

diff --git a/engines/hdb/ai-bots.cpp b/engines/hdb/ai-bots.cpp
new file mode 100644
index 0000000000..25d734a720
--- /dev/null
+++ b/engines/hdb/ai-bots.cpp
@@ -0,0 +1,132 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "hdb/hdb.h"
+
+namespace HDB {
+
+void aiOmniBotInit(AIEntity *e) {
+	if (e->value1 == 1)
+		e->aiAction = aiOmniBotMove;
+	else if (g_hdb->_ai->findPath(e))
+		e->aiAction = aiOmniBotAction;
+}
+
+void aiOmniBotInit2(AIEntity *e) {
+	e->standdownGfx[0] = e->movedownGfx[0];
+	e->standupGfx[0] = e->movedownGfx[0];
+	e->standleftGfx[0] = e->moveleftGfx[0];
+	e->standrightGfx[0] = e->moverightGfx[0];
+	e->standdownFrames = e->standupFrames = e->standleftFrames = e->standrightFrames = 1;
+	e->draw = g_hdb->_ai->getStandFrameDir(e);
+}
+
+void aiOmniBotMove(AIEntity *e) {
+	if (e->goalX)
+		g_hdb->_ai->animateEntity(e);
+	else
+		g_hdb->_ai->animEntFrames(e);
+}
+
+void aiOmniBotAction(AIEntity *e) {
+	AIEntity *p = g_hdb->_ai->getPlayer();
+	if (e->goalX) {
+		if (!e->sequence) {
+			g_hdb->_ai->animateEntity(e);
+			// Is the Player collding?
+			if (e->onScreen && (p->level = e->level) && g_hdb->_ai->checkPlayerCollision(e->x, e->y, 4) && !g_hdb->_ai->playerDead()) {
+				g_hdb->_ai->killPlayer(DEATH_FRIED);
+				return;
+			}
+
+			// Shoot player ?
+			if (onEvenTile(e->x, e->y) && g_hdb->getActionMode()) {
+				int xv = 0, yv = 0, result;
+				int shoot = 0;
+				AIEntity *omni;
+				// FIXME: Is reloading Player required here?
+				p = g_hdb->_ai->getPlayer();
+
+				// On same level/screen?
+				if ((e->level != p->level) || g_hdb->_ai->playerDead() || !e->onScreen)
+					return;
+
+				// Is Player in Line of Sight?
+				switch (e->dir) {
+				case DIR_UP:
+					if (p->x == e->x && p->y < e->y) {
+						shoot = 1;
+						yv = -1;
+					}
+					break;
+				case DIR_DOWN:
+					if (p->x == e->x && p->y > e->y) {
+						shoot = 1;
+						yv = 1;
+					}
+					break;
+				case DIR_LEFT:
+					if (p->x < e->x && p->y == e->y) {
+						shoot = 1;
+						xv = -1;
+					}
+					break;
+				case DIR_RIGHT:
+					if (p->x > e->x && p->y == e->y) {
+						shoot = 1;
+						xv = 1;
+					}
+					break;
+				case DIR_NONE:
+					warning("aiOmniBotAction: DIR_NONE found");
+					break;
+				}
+
+				// If shoot = 1, take the shot
+				// (1) Check we're not shooting into a solid tile
+				// (2) Check we're not shooting into an Entity unless it's the player
+				AIEntity *hit = g_hdb->_ai->legalMoveOverWater(e->tileX+xv, e->tileY + yv, e->level, &result);
+				if (shoot && !hit && result) {
+					omni = g_hdb->_ai->spawn(AI_OMNIBOT_MISSILE, e->dir, e->tileX + xv, e->tileY + yv, NULL, NULL, NULL, DIR_NONE, e->level, 0, 0, 1);
+					omni->xVel = xv * kPlayerMoveSpeed * 2;
+					omni->yVel = yv * kPlayerMoveSpeed * 2;
+					if (g_hdb->_map->onScreen(e->tileX, e->tileY))
+						warning("STUB: aiOmniBotAction: Play SND_OMNIBOT_FIRE");
+					if (!g_hdb->getActionMode()) {
+						omni->xVel >>= 1;
+						omni->yVel >>= 1;
+					}
+					e->sequence = 16;
+				}
+			}
+		}
+	} else {
+		g_hdb->_ai->findPath(e);
+		if (e->onScreen)
+			warning("STUB: aiOmniBotAction: Play SND_OMNIBOT_AMBIENT");
+	}
+
+	if (e->sequence)
+		e->sequence--;
+}
+
+} // End of Namespace
diff --git a/engines/hdb/ai-player.cpp b/engines/hdb/ai-player.cpp
index 4cace98e76..940ddcb94c 100644
--- a/engines/hdb/ai-player.cpp
+++ b/engines/hdb/ai-player.cpp
@@ -480,14 +480,6 @@ void aiPushBotAction(AIEntity *e) {
 	warning("STUB: AI: aiPushBotAction required");
 }
 
-void aiOmniBotAction(AIEntity *e) {
-	warning("STUB: AI: aiOmniBotAction required");
-}
-
-void aiOmniBotMove(AIEntity *e) {
-	warning("STUB: AI: aiOmniBotMove required");
-}
-
 void aiLaserAction(AIEntity *e) {
 	warning("STUB: AI: aiLaserAction required");
 }
@@ -588,14 +580,6 @@ void aiListenBotInit2(AIEntity *e) {
 	warning("STUB: AI: aiListenBotInit2 required");
 }
 
-void aiOmniBotInit(AIEntity *e) {
-	warning("STUB: AI: aiOmniBotInit required");
-}
-
-void aiOmniBotInit2(AIEntity *e) {
-	warning("STUB: AI: aiOmniBotInit2 required");
-}
-
 void aiLaserInit(AIEntity *e) {
 	warning("STUB: AI: aiLaserInit required");
 }
diff --git a/engines/hdb/module.mk b/engines/hdb/module.mk
index 432998def9..bf53ad0473 100644
--- a/engines/hdb/module.mk
+++ b/engines/hdb/module.mk
@@ -1,6 +1,7 @@
 MODULE := engines/hdb
 
 MODULE_OBJS := \
+	ai-bots.o \
 	ai-cinematic.o \
 	ai-funcs.o \
 	ai-init.o \